Malicious PDF — malware analysis report

Static analysis result for SHA-256 07661a9cbf504af2…

MALICIOUS

PDF

69.6 KB Created: 2020-08-29 11:13:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 366a5fd4b7fe681e2bcccf4c364d5cdf SHA-1: 671220918d787d556139ed8ef88c0ce1e24a455f SHA-256: 07661a9cbf504af2433c7513a53bfb7012e904aad5ef3aa822cbc00cf1cab668
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a search result. This suggests a phishing or scam attempt to redirect the user to malicious content. The PDF also hosts a large number of links to other PDFs, potentially for SEO manipulation or to appear as a legitimate resource. No scripts were extracted, limiting the analysis of further malicious behavior.

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/wix?keyword=teorema+de+bayes+ejemplo
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0447/2481/3977/files/simple_algebraic_expressions.pdf
    • https://cdn.shopify.com/s/files/1/0428/5222/1091/files/roxofip.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2674/files/saad_lamjarred_lm3allem_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0433/7503/4520/files/analogy_reasoning_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40169505762.pdf
    • https://cdn.shopify.com/s/files/1/0427/8393/2582/files/gagavukibuki.pdf
    • https://cdn.shopify.com/s/files/1/0431/5486/6333/files/nidewuwotiwipub.pdf
    • https://static.usrfiles.com/ugd/b8c837_f44395fece5340d8b2952a9db3289c90.pdf
    • https://static.usrfiles.com/ugd/b8c837_b72b27a34f524b0f8a4beff5cfb824de.pdf
    • https://static.usrfiles.com/ugd/b8c837_138a41a3984743aea227988c9871ca9b.pdf
    • https://static.usrfiles.com/ugd/b8c837_d4f0c95c0cfc47c3ad749529c535000e.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ab28.bin
41403caa3e6652eb8335461e3682d460e5df0eed1532ebff2107a81740087f6a
pdf-font-stream PDF embedded font (sfnt) at offset 0xAB28 5372 bytes
font_01_sfnt_off0000bd5f.bin
2b13d093d3d220737752bc95b4cdb00d8189a1160ede46edb39b452454c1fe56
pdf-font-stream PDF embedded font (sfnt) at offset 0xBD5F 17544 bytes
font_02_sfnt_off0000f2a0.bin
76b1e5c527ebdc575d2dc06ecd112a30fc6895ca918be3788fd81dc278520499
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A0 16180 bytes