Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bc13e0bf7ab7ce1…

MALICIOUS

PDF

71.7 KB Created: 2020-08-08 10:25:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e65f305ccdc3d9891f6b4a12ee2981cb SHA-1: 37d6a66458babbda7e581da05a94af9705e0784c SHA-256: 5bc13e0bf7ab7ce1811d54ac9fb8e8ec9a917e686fe506654b0102ef9f4823b0
154 Risk Score

Malware Insights

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

The PDF contains embedded links that lead to a known malicious redirector, disguised as a maintenance manual. The heuristic firings indicate this PDF is designed to redirect users to malicious infrastructure, likely for phishing or malware distribution. No scripts were extracted, but the presence of malicious links is sufficient evidence of malicious intent.

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.cc/pify?keyword=atlas+copco+air+compressor+maintenance+manual+pdf
    • http://files.drjaygrossman.com/uploads/1/3/1/4/131453588/marivawilerumo_radiletifef_sofukat.pdf
    • http://junalidog.bakersfieldcustomsigns.com/uploads/1/3/1/6/131637136/94b1d1dbc83.pdf
    • http://files.karenhalpern.net/uploads/1/3/1/4/131407406/5973e0db8.pdf
    • http://bogatok.eimanelgibreen.com/uploads/1/3/1/3/131380485/xulatono_vupaf_zubim_valufubavogo.pdf
    • http://files.hanna-jang.com/uploads/1/3/0/7/130738918/222be96f1f3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/5358/0441/files/19649573742.pdf
    • https://cdn.shopify.com/s/files/1/0435/1374/1471/files/43479755367.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/64143080377.pdf
    • https://cdn.shopify.com/s/files/1/0432/5530/0249/files/ielts_academic_task_2_vocabulary.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pexigubozorabavajodumixi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8945/3473/files/89531547141.pdf
    • https://cdn.shopify.com/s/files/1/0436/1617/4243/files/sovizafaxoloxilajode.pdf
    • https://cdn.shopify.com/s/files/1/0430/3486/9921/files/tapoxorimarasabopod.pdf
    • https://cdn.shopify.com/s/files/1/0428/8859/3567/files/65323627547.pdf
    • https://cdn.shopify.com/s/files/1/0427/8085/2383/files/4663703139.pdf
    • https://cdn.shopify.com/s/files/1/0433/8280/0542/files/gapipadufesonapifibej.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c370.bin
a17885b4fd577e0298a64705d5055d2ac7c2363fd7008e9cf236b3df412a17d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC370 2828 bytes
font_01_sfnt_off0000cd6a.bin
767aadf159b4b8da4fff618a3dda51dc5fd67bc676f071e52ad5931856c420c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD6A 5172 bytes
font_02_sfnt_off0000ded9.bin
9be6f5488dac8379fb2fd529eb53971d1a7a56dfa060bbce4826ca63a21a9abc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDED9 9848 bytes
font_03_sfnt_off0001006a.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1006A 4324 bytes

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