Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d8af8429280b114…

MALICIOUS

PDF

45.0 KB Created: 2020-08-03 15:18:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34e2f2aa9990d84672e0e7cc2175a14a SHA-1: 3d5e573889981865d6fad7ff1b3f6dceff12a3e9 SHA-256: 0d8af8429280b1141b913aef8e145cfdbcec43ff6052db6773bef713aec1dc8c
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically a URL related to computer generations. It also exhibits characteristics of a PDF link farm, with numerous external PDF links. The ML classifier strongly indicates maliciousness. The embedded URL points to a redirector that likely leads to further malicious content.

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=characteristics+of+computer+generations+pdf
    • http://files.jacquelyncarterdesigns.com/uploads/1/3/0/7/130739827/danewu_tapokifagu_zotugofulu.pdf
    • http://files.eogwellness.com/uploads/1/3/1/6/131607805/kutigixemakito.pdf
    • http://files.dhbeautybar.com/uploads/1/3/1/3/131397971/ridafifog-fufifovetane-zuvidobeles.pdf
    • http://files.circleofwealthgroup.com/uploads/1/3/1/3/131383541/vagizivusenizi.pdf
    • http://files.buyers-club-solar.com/uploads/1/3/0/8/130874691/sudivodix_japujomeva.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/1350/5185/files/tulenugituletetubupanij.pdf
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/kemagufibolimobibolameg.pdf
    • https://cdn.shopify.com/s/files/1/0432/8266/1526/files/tezide.pdf
    • https://cdn.shopify.com/s/files/1/0437/9472/7074/files/83453461391.pdf
    • https://cdn.shopify.com/s/files/1/0434/7330/5762/files/11112821552.pdf
    • https://cdn.shopify.com/s/files/1/0435/2655/3752/files/repakafafesadubut.pdf
    • https://cdn.shopify.com/s/files/1/0429/1349/7247/files/23481564207.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5804/files/48807394923.pdf
    • https://cdn.shopify.com/s/files/1/0433/3184/6296/files/fubifonewu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9581/8404/files/9752055868.pdf
    • https://cdn.shopify.com/s/files/1/0431/1888/7068/files/escape_from_tarkov_inventory_controls.pdf
    • https://cdn.shopify.com/s/files/1/0438/4620/5602/files/88746223611.pdf
    • https://cdn.shopify.com/s/files/1/0429/4167/7731/files/libaveronugo.pdf
    • https://cdn.shopify.com/s/files/1/0437/8863/2213/files/54429182636.pdf
    • https://www.cancer.gov/coronavirus
    • 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_off0000706f.bin
883c2cf775ee9b3e035e321be9f8145aa527e4ce91b29700ad54dca290a2e11a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x706F 5440 bytes
font_01_sfnt_off000082c1.bin
7c0c9a611efe6d1d25e487dfec9dc57b9f46d3b993c5ebf5cf9d8bfbaa6542d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82C1 10412 bytes

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