Malicious PDF — malware analysis report

Static analysis result for SHA-256 552a574027904f1f…

MALICIOUS

PDF

40.3 KB Created: 2020-09-02 14:44:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 118add0d0d8b6ab044cb8c175e60dab4 SHA-1: 1c4510e804f05255d974552162c35f347c278e43 SHA-256: 552a574027904f1fb2fb2c89b523e51b0776093843f5f825992173f35b20bd6a
152 Risk Score

Malware Insights

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

The PDF contains a mass external link farm pointing to numerous PDFs hosted on Shopify, with one primary link to a known malicious redirector at 'ttraff.cc'. This indicates a likely phishing or malware distribution campaign. The ML classifier strongly supports the malicious nature of this document.

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=asos+tours+get+your+guide
    • https://cdn.shopify.com/s/files/1/0430/2834/9085/files/vebopopikalikupig.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pesaveput.pdf
    • https://cdn.shopify.com/s/files/1/0433/5904/3749/files/taxazidaripanupoginupura.pdf
    • https://cdn.shopify.com/s/files/1/0432/6280/4136/files/difix.pdf
    • https://cdn.shopify.com/s/files/1/0429/2601/4620/files/92717298925.pdf
    • https://cdn.shopify.com/s/files/1/0437/8856/6677/files/51452569326.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/83583068491.pdf
    • https://cdn.shopify.com/s/files/1/0432/4642/0136/files/pududasogiviguzipekiriw.pdf
    • https://cdn.shopify.com/s/files/1/0432/3393/5519/files/jipefetibasebugofulefonan.pdf
    • https://cdn.shopify.com/s/files/1/0429/7146/3831/files/81079645068.pdf
    • https://cdn.shopify.com/s/files/1/0449/8151/8494/files/tevovowe.pdf
    • https://cdn.shopify.com/s/files/1/0435/0741/7253/files/vigeruvarubutebaroriwa.pdf
    • https://cdn.shopify.com/s/files/1/0428/7728/8611/files/nagilifusa.pdf
    • https://cdn.shopify.com/s/files/1/0431/2072/2080/files/abnormal_psychology_barlow.pdf
    • https://cdn.shopify.com/s/files/1/0436/9501/4042/files/lolaxutogu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9455/7347/files/vevuvik.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000539e.bin
1499ac6f3f76b48834b41f6d67876cf086eada25f4a135c77c4a7221bdcaae0f
pdf-font-stream PDF embedded font (sfnt) at offset 0x539E 4616 bytes
font_01_sfnt_off0000636f.bin
159622839e5f9a26391cad9172329cf7ef3484b6cbcf29c179a14fd9a3ade570
pdf-font-stream PDF embedded font (sfnt) at offset 0x636F 10520 bytes
font_02_sfnt_off00008664.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x8664 4324 bytes