Malicious PDF — malware analysis report

Static analysis result for SHA-256 18fffb726999a2c5…

MALICIOUS

PDF

32.7 KB Created: 2020-08-20 05:47:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f37635d426425656af7a336cd2031be8 SHA-1: 9a4b4c2a5f31fd85d131a057e10324e9995ee246 SHA-256: 18fffb726999a2c504a4ae11a1eb76a76e035d5fac6e5ca5a2e8d4d90529a337
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector URL, indicating an attempt to drive traffic to malicious infrastructure. The embedded document body, though heavily corrupted, contains the URL 'https://ttraff.cc/pify?keyword=metro+map+pdf', which is flagged as a malicious redirector. This suggests the document's primary purpose is to redirect users to potentially harmful 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.cc/pify?keyword=metro+map+pdf
    • http://files.motivence.com/uploads/1/3/1/4/131453715/xazibosaxigijam.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/7348/6496/files/dopelipodu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7065/1558/files/texojekogo.pdf
    • https://cdn.shopify.com/s/files/1/0435/6639/9647/files/can_you_transfer_enchantments_in_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0431/8032/7070/files/40256289261.pdf
    • https://cdn.shopify.com/s/files/1/0434/4827/1000/files/64972231916.pdf
    • https://cdn.shopify.com/s/files/1/0433/1359/4526/files/breakup_video_status_song.pdf
    • https://cdn.shopify.com/s/files/1/0435/7311/7091/files/12858852758.pdf
    • https://cdn.shopify.com/s/files/1/0432/5598/8374/files/narazelakuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/0840/1316/files/53875145643.pdf
    • https://cdn.shopify.com/s/files/1/0435/5037/6099/files/makalah_budaya_bali.pdf
    • https://cdn.shopify.com/s/files/1/0430/8025/3593/files/gusugudegajojukafat.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fapodepemiretewuroraga.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_off00004495.bin
e05f6bcfee0aab222dc7ca04a25aa3ac078d9a10ff8f21ef8471b3675dc7bcda
pdf-font-stream PDF embedded font (sfnt) at offset 0x4495 4984 bytes
font_01_sfnt_off00005575.bin
5f5b4a344b66ebaef1f3e19cadeeeb031f7e16c386175ecc1338a92196a4c7d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5575 9696 bytes