Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fa9b7028a003e0d…

MALICIOUS

PDF

43.2 KB Created: 2020-08-31 11:04:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e029baaf656bb8fed40a4589f7cda029 SHA-1: e4bcb76b41bfeeddc83874affe74952d823f37fb SHA-256: 8fa9b7028a003e0d920f5821068c36abc135363510ca481b8b56aec78a263f4b
154 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, embedding numerous URLs. One prominent URL, 'https://ttraff.com/wix?keyword=does+the+moto+g6+have+nfc', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body contains garbled text alongside the suspicious URL, suggesting an attempt to disguise or obfuscate the 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.com/wix?keyword=does+the+moto+g6+have+nfc
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dutevitijenunolekegek.pdf
    • https://cdn.shopify.com/s/files/1/0440/7522/1142/files/40_short_stories_portable_anthology_5th_17.pdf
    • https://cdn.shopify.com/s/files/1/0435/1541/2632/files/28748264414.pdf
    • https://cdn.shopify.com/s/files/1/0433/3817/0523/files/die_young_sylvan_esso_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0436/1011/2163/files/swing_trading_simplified.pdf
    • https://static.usrfiles.com/ugd/d1d005_ddd6164be4034419a1b316634d9ef6e1.pdf
    • https://static.usrfiles.com/ugd/590778_973242dd26e6461184abadb794a8a403.pdf
    • https://static.usrfiles.com/ugd/0adedf_0aa43f7f4731400abc979aeef3e9c864.pdf
    • https://static.usrfiles.com/ugd/2c608b_a064589474f44e9e8257753f365fb4c9.pdf
    • https://static.usrfiles.com/ugd/2e79a6_ff5001f854d74216ac393fc4091ce141.pdf
    • https://static.usrfiles.com/ugd/45e30f_f7bf4f84fca44af88b58802e6e09773f.pdf
    • https://cdn.shopify.com/s/files/1/0439/6757/8270/files/accrual_basis_of_accounting.pdf
    • https://cdn.shopify.com/s/files/1/0430/3906/4225/files/spotify_hosts_file_2018.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068a4.bin
6defc2545ce3097aa161ff16869be78e77a0a76bfbb4ac4eaf23473ee57164d5
pdf-font-stream PDF embedded font (sfnt) at offset 0x68A4 5380 bytes
font_01_sfnt_off00007ae7.bin
65b2a46fb289f45a88fe29ff12b01db464c25d7c7f1cf3cf1d785174222f3f1f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE7 11108 bytes