Malicious PDF — malware analysis report

Static analysis result for SHA-256 e93dfff6ece50e28…

MALICIOUS

PDF

36.7 KB Created: 2020-08-23 22:51:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e174204b1decf70090c556abfb93138 SHA-1: f8502f14ef175d4948a4469c07cfcf91e7918258 SHA-256: e93dfff6ece50e281cbf30b9b7f3e3579b5c154c85180894c8fa53295e086a8a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=super+bright+led+torch+apk'. This link is presented within the document body, suggesting a social engineering lure related to an Android application. The PDF also contains a link farm, indicating an attempt to manipulate search engine results or distribute content widely. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.com/pify?keyword=super+bright+led+torch+apk
    • http://files.smileboutiques.com/uploads/1/3/1/4/131453316/zonafasakowebi-zulabo-gufasixife-tegorono.pdf
    • http://gagomiz.harrowscape.com/uploads/1/3/0/7/130740072/87266.pdf
    • http://files.riseoverrunfit.com/uploads/1/3/2/7/132710748/537693.pdf
    • https://cdn.shopify.com/s/files/1/0437/0294/3909/files/android_animation_interpolator_types.pdf
    • https://cdn.shopify.com/s/files/1/0432/9717/7768/files/vajimukafarulasapivik.pdf
    • https://cdn.shopify.com/s/files/1/0433/4655/9127/files/au_gun_gungeon.pdf
    • https://cdn.shopify.com/s/files/1/0431/4998/3901/files/15875375776.pdf
    • https://cdn.shopify.com/s/files/1/0432/5444/8286/files/42421466259.pdf
    • https://cdn.shopify.com/s/files/1/0430/4823/9257/files/93245531418.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51982080438.pdf
    • https://cdn.shopify.com/s/files/1/0461/7820/5850/files/zapapolujiralaxila.pdf
    • https://cdn.shopify.com/s/files/1/0432/2190/9662/files/59866769691.pdf
    • https://cdn.shopify.com/s/files/1/0433/3253/4440/files/kejomerasetisezekesurejep.pdf
    • https://cdn.shopify.com/s/files/1/0437/1005/4554/files/ladomodusosi.pdf
    • https://cdn.shopify.com/s/files/1/0434/1412/6759/files/jexupumeromugifujoniviva.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000045ad.bin
21ec78a34f55286f007f8cd741fef962a520394cedc730c63c537a619011107d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45AD 5240 bytes
font_01_sfnt_off00005786.bin
6ba492d287f259531f63130b7a7f78ef46c8fbaebb6b0980ad441c5a8045b039		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5786 9440 bytes
font_02_sfnt_off000077b5.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77B5 4324 bytes

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