Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c3810e5b15907d3…

MALICIOUS

PDF

37.2 KB Created: 2020-08-09 23:17:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d588350f09f69ea9b24b096e5de6f22b SHA-1: 2ab3a4b2ef6e3f834df2b94b3db578b6038d5b9f SHA-256: 7c3810e5b15907d3a6483a9e375b001c89525f0de538c92a7257da9fa289d792
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body, though heavily corrupted, contains text related to 'law of attraction the secret pdf free download' and a URL that matches the redirector found in the heuristics. This suggests a tactic to drive traffic to malicious sites, likely for SEO spam or to host phishing 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.ru/pify?keyword=law+of+attraction+the+secret+pdf+free+download
    • http://files.hudsonartseason.com/uploads/1/3/1/4/131406800/931f4dac.pdf
    • http://files.xtopherjames.com/uploads/1/3/2/6/132695213/5248202.pdf
    • http://files.rebeccanehringpainting.com/uploads/1/3/0/8/130813757/6474848.pdf
    • http://niratiz.sourmashstringband.com/uploads/1/3/0/9/130969352/fa26528f31.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/14624782299.pdf
    • https://cdn.shopify.com/s/files/1/0428/9550/7622/files/xagotu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9361/files/84583885990.pdf
    • https://cdn.shopify.com/s/files/1/0432/2505/5387/files/hiv_and_aids_prevention.pdf
    • https://cdn.shopify.com/s/files/1/0432/2410/5124/files/90048655364.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/lewotatonazosefowasolomor.pdf
    • https://cdn.shopify.com/s/files/1/0433/6245/1611/files/zuxetapezubasetajekikoko.pdf
    • https://cdn.shopify.com/s/files/1/0428/4288/2215/files/kakaragiluzetalemamo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/bojizizawe.pdf
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/54269664863.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/palafasejuzanuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/3159/3113/files/60253290034.pdf
    • https://cdn.shopify.com/s/files/1/0431/5699/6247/files/29659454714.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_off00005426.bin
c941c2d78b812e1e4ef5d9982cae477f889f43fcbee466810a9553eede24504c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5426 5276 bytes
font_01_sfnt_off0000662d.bin
c006dedf5dbe99d1e38624062abbb0c871dc2f024e2ca24d4a296cd558ae682d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x662D 9880 bytes

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