Malicious PDF — malware analysis report

Static analysis result for SHA-256 030357e9b8115cda…

MALICIOUS

PDF

55.2 KB Created: 2020-08-08 11:13:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30994a708d4517f890c41ce9a0ca0eab SHA-1: 492636812f47bd78d0827006f66867d33c6c5498 SHA-256: 030357e9b8115cda8fbd4bd2affc18a092763d6a85cecf682374a019b7a12953
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure, directing users to a potentially malicious site.

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=facebook+graph+api+tutorial+pdf
    • http://files.proformancehealthaz.com/uploads/1/3/0/9/130969265/ganurof-butokidu-narawetaledot.pdf
    • http://files.thepotteryplace.co.uk/uploads/1/3/0/8/130813330/eb8ebdc.pdf
    • http://nonilodo.darlarosedesignerhats.com/uploads/1/3/0/8/130814921/mebabelobesojijo.pdf
    • http://files.keirahackman.com/uploads/1/3/1/4/131438324/kovusik_bixiguxozitu_lelexor_mavaw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/4895/9141/files/lightning_thief_graphic_novel_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/9985/7823/files/26986851600.pdf
    • https://cdn.shopify.com/s/files/1/0433/6159/9656/files/48505725363.pdf
    • https://cdn.shopify.com/s/files/1/0432/5844/5979/files/gupediguxowesuwa.pdf
    • https://cdn.shopify.com/s/files/1/0435/3294/3519/files/ximuzo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7202/8823/files/37845155612.pdf
    • https://cdn.shopify.com/s/files/1/0428/1407/9143/files/41196203121.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8758/files/65706864533.pdf
    • https://cdn.shopify.com/s/files/1/0429/6913/7305/files/alcohol_use_disorder_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0431/2255/7082/files/keguvedalowagov.pdf
    • https://cdn.shopify.com/s/files/1/0432/5271/1582/files/94035380793.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_off00008d3d.bin
031c3a7ced159bd69f709be355849e34f1ce6712d22d779f4c73aae0d8ac7f5f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D3D 5396 bytes
font_01_sfnt_off00009f92.bin
80cc206e329ebebf051f0ee7ab31a402cdc1f480114e1dfa24918d54bb95f9ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x9F92 15184 bytes