Malicious PDF — malware analysis report

Static analysis result for SHA-256 342e5d754ac6feaf…

MALICIOUS

PDF

48.5 KB Created: 2020-08-16 20:37:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7de1c1bd91e03743b1cb2e0e83c31fea SHA-1: 00a0d9f7f2c684692c917b6ad6ad6220bf4b43c2 SHA-256: 342e5d754ac6feafeb768e3e6bf3347c6dc43892c13ced17adddfe4f35ee71f6
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific malicious redirector URL, indicating an attempt to drive traffic to potentially harmful content. The embedded document body text, though corrupted, contains the malicious URL and appears to be a lure for a game leveling guide. 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.ru/pify?keyword=dragon+nest+sea+2018+leveling+guide
    • http://files.pospaperhawaii.com/uploads/1/3/1/6/131606890/jolunovivutazuvoj.pdf
    • http://files.toeringexpressions.com/uploads/1/3/1/4/131437005/2501841.pdf
    • http://files.interiorwellbeing.com/uploads/1/3/2/6/132696335/7717986.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0438/2579/1133/files/fruity_loops_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/4012/6614/files/aiag_manual_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/60359225188.pdf
    • https://cdn.shopify.com/s/files/1/0428/1758/5308/files/53153766621.pdf
    • https://cdn.shopify.com/s/files/1/0433/2571/8678/files/latudeguledexiweduteroda.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/golasabigizejusudavijitu.pdf
    • https://cdn.shopify.com/s/files/1/0437/7968/6549/files/list_of_synonyms_and_antonyms_in_alphabetical_order.pdf
    • https://cdn.shopify.com/s/files/1/0433/0536/9758/files/38378058291.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/texuworupidutal.pdf
    • https://cdn.shopify.com/s/files/1/0431/8278/4673/files/gonuketokibamutako.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000715d.bin
29efa3714b653893494bf84b76e9115f46d475d461fc4eda575c5b8e12a490d3
pdf-font-stream PDF embedded font (sfnt) at offset 0x715D 5456 bytes
font_01_sfnt_off000083fb.bin
5dcb9222e681de84c7e03c2977f48459702cadcc6df0c79539e5f163198996d5
pdf-font-stream PDF embedded font (sfnt) at offset 0x83FB 10360 bytes
font_02_sfnt_off0000a766.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xA766 4324 bytes