Malicious PDF — malware analysis report

Static analysis result for SHA-256 365d95b954e783a4…

MALICIOUS

PDF

53.9 KB Created: 2020-08-19 11:03:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07fc853dae23c3e936dd8009b44fc038 SHA-1: d40039d42ab6ad9f2492fc682c52bf8d10a1f648 SHA-256: 365d95b954e783a452dd03637dda2ead0473dd417f3dbc243c160b4ca4a7da17
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, including one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'corporate accounting theory notes pdf' and the malicious URL. The heuristic firings indicate the PDF is designed to redirect users to malicious sites, likely as part of a phishing or scam campaign.

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.com/pify?keyword=corporate+accounting+theory+notes+pdf
    • http://files.seanbiehnmusiccareer.com/uploads/1/3/1/4/131483097/6293497.pdf
    • http://zawose.pvdbc.com/uploads/1/3/1/8/131856935/5479459.pdf
    • https://cdn.shopify.com/s/files/1/0435/4283/9455/files/apj_abdul_kalam_information_in_marathi_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/4291/3952/files/45727088963.pdf
    • https://cdn.shopify.com/s/files/1/0430/8716/7649/files/ruzazonuzadaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/1000uf_25v_electrolytic_capacitor_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/2124/6359/files/xurinupamosegefelurumita.pdf
    • https://cdn.shopify.com/s/files/1/0428/0313/4627/files/24956212904.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/17232613021.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rokagarunawawutasa.pdf
    • https://cdn.shopify.com/s/files/1/0427/4274/3207/files/dojavifuviloxuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/79807552326.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/

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b30.bin
0eac1552a6a0cc8d6d43e14f5c157d052ff2bf21460314f67a2c213e0a454e63
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B30 6744 bytes
font_01_sfnt_off00007c17.bin
ff318b7727aa1666527b7365c1ffcdfbd69829e1cd48f9035ae7f0339b07ba77
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C17 5392 bytes
font_02_sfnt_off00008e69.bin
996d87cb89b21d59bf6165a2a52d9e5b53c26c6dfb65fa33579d5621f6e6caa3
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E69 14836 bytes
font_03_sfnt_off0000bc5a.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0xBC5A 4324 bytes