Malicious PDF — malware analysis report

Static analysis result for SHA-256 63f76292aac4bba7…

MALICIOUS

PDF

112.7 KB Created: 2020-08-18 15:52:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82471e4faf20fd3b470cfa0db287b44a SHA-1: b89132c6883438c404fc235904e8e655521703ff SHA-256: 63f76292aac4bba7d63f144b207eb52f0474ec32e823fd9504d10d59133772bb
230 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple heuristics indicating malicious intent, including a critical finding for a link to known malicious redirector infrastructure and a high-severity flag for an advance-fee scam lure. The document body, though partially obfuscated, contains the URL that triggered these alerts. The presence of numerous external PDF links suggests a link farm or a method to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 8

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=guidewire+connections+2019+cost
    • http://budunonur.hannanicholeart.com/uploads/1/3/1/4/131409546/pizun.pdf
    • http://files.dukeengagedetroit.org/uploads/1/3/1/8/131871501/faluwis.pdf
    • http://vadite.nyamewim.org/uploads/1/3/1/6/131606000/e8f007.pdf
    • http://zuwexafa.lovelaughterandlife.com/uploads/1/3/1/3/131380600/dubizewukaweke-xuwagemezu-tosuvudifaxixi-gobexulilukax.pdf
    • http://files.lkradio.online/uploads/1/3/1/6/131636903/tamog.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/1239/6968/files/krishna_objective_zoology_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/4532/9832/files/3862099753.pdf
    • https://cdn.shopify.com/s/files/1/0429/1087/5815/files/aquatic_plants_list_with_pictures.pdf
    • https://cdn.shopify.com/s/files/1/0432/8567/6192/files/exercise_past_continuous_tense.pdf
    • https://cdn.shopify.com/s/files/1/0430/3876/9303/files/apprendre_l_italien_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0433/5920/7592/files/cav_injection_pump.pdf
    • https://cdn.shopify.com/s/files/1/0435/8648/6440/files/jixagasaliwawaxed.pdf
    • https://cdn.shopify.com/s/files/1/0431/1446/3394/files/xezalirozadarole.pdf
    • https://cdn.shopify.com/s/files/1/0431/2979/8818/files/leramija.pdf
    • https://cdn.shopify.com/s/files/1/0432/1096/5147/files/broadsheet_sydney_after_work_drinks.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017b50.bin
6e31609f7b8695c07c6053efb82ae371ccd2c8992b556fbd2f4799e686b23f47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17B50 5296 bytes
font_01_sfnt_off00018d7a.bin
254d8d45d46f6b02e0e44f5d4cce0ce2c728def1d1a8ef74404619389b867a4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18D7A 11692 bytes

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