Malicious PDF — malware analysis report

Static analysis result for SHA-256 07b2f84cb234207e…

MALICIOUS

PDF

44.9 KB Created: 2020-08-10 00:38:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 248ea548366588fa0cd41d82c2113784 SHA-1: bacff6def52ef870e272b3467d5492a2da4f57f3 SHA-256: 07b2f84cb234207e5bd2b8540ade09856c747bab3dc3ba04ed317d108de832ad
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including a critical redirector link to ttraff.cc, which is known malicious infrastructure. The document body, though heavily obfuscated, contains text related to "Battle of the bulge map pdf" and embeds multiple URLs, suggesting a lure to a malicious site. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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=battle+of+the+bulge+map+pdf
    • http://labojode.pp-personalprotection.com/uploads/1/3/0/7/130776485/16c5ea90.pdf
    • http://files.sheilanonato.com/uploads/1/3/1/3/131380042/jozukugenetito.pdf
    • http://files.sogo.cc/uploads/1/3/1/3/131379899/4919236.pdf
    • http://gikipuvam.guinchilaryorkshireterrierschihuahuas.com/uploads/1/3/1/6/131637136/goxujomik-fonujujoge-wulapewema-litubidudato.pdf
    • http://files.graysong.com/uploads/1/3/0/7/130739480/8824830.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/1535/6067/files/t25_diet_plan.pdf
    • https://cdn.shopify.com/s/files/1/0430/1294/8121/files/fusesuvaginega.pdf
    • https://cdn.shopify.com/s/files/1/0430/6495/0946/files/rapesotaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/8068/7520/files/15690379460.pdf
    • https://cdn.shopify.com/s/files/1/0436/8600/2838/files/jibuzegatokinepovowiv.pdf
    • https://cdn.shopify.com/s/files/1/0436/8013/7369/files/binary_to_hexadecimal_table.pdf
    • https://cdn.shopify.com/s/files/1/0445/3256/4132/files/81775102483.pdf
    • https://cdn.shopify.com/s/files/1/0434/2795/4853/files/anaphore_et_cataphore.pdf
    • https://cdn.shopify.com/s/files/1/0429/0091/4343/files/55006760601.pdf
    • https://cdn.shopify.com/s/files/1/0448/4002/6273/files/bangla_typing_keyboard.pdf
    • https://cdn.shopify.com/s/files/1/0428/4389/8019/files/vitananuxutevokipenused.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_off00006546.bin
a0e9d7df5dab5a8a74168369bc58f8b4a16b6da72263c5be5c050eb4b92070e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6546 5100 bytes
font_01_sfnt_off000076ac.bin
1f1534231d19abcc9d9be2546a2d8c05a107d085d863065d3ec346d5e1502108		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76AC 9992 bytes
font_02_sfnt_off000098d2.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98D2 4324 bytes

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