Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dec463e07754566…

MALICIOUS

PDF

43.2 KB Created: 2020-08-24 00:41:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db5964f6a5da7b5359d82fd4f829607c SHA-1: 252e66f3c5656eeb2c762279ed3899ceef8bf0bf SHA-256: 8dec463e0775456622ec9ee1dd29351a69b76ca10d1523850ea7fa6a1de37e58
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a lure for an 'Awards for all application form 2019' and embeds numerous links. One critical heuristic firing indicates that the PDF links to known malicious redirector infrastructure, specifically 'https://ttraff.ru/pify?keyword=awards+for+all+application+form+2019'. The ML classifier also strongly flagged this PDF as malicious. The document body itself is heavily obfuscated but contains the same URLs, suggesting the primary intent is to redirect the user to malicious sites.

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.ru/pify?keyword=awards+for+all+application+form+2019
    • http://files.collieinspections.com/uploads/1/3/1/1/131164310/voxizezosogef-zewokuwuvimeli-jakanisaku-dusumuwujikem.pdf
    • http://baduvov.jacquelinecutler.com/uploads/1/3/0/8/130814229/76e426f43da.pdf
    • http://files.meganfmccormick.com/uploads/1/3/1/4/131438843/zutolazogomolovaned.pdf
    • http://files.theplastereddragon.com/uploads/1/3/0/8/130874163/3aa72.pdf
    • http://files.bellafiorelagottos.com/uploads/1/3/0/7/130776542/3dec942c4ab251.pdf
    • https://cdn.shopify.com/s/files/1/0433/7264/2460/files/9319295202.pdf
    • https://cdn.shopify.com/s/files/1/0437/5589/6990/files/29824261654.pdf
    • https://cdn.shopify.com/s/files/1/0434/1386/4604/files/4e_manual_of_the_planes.pdf
    • https://cdn.shopify.com/s/files/1/0436/9580/0475/files/wotafikenisokoba.pdf
    • https://cdn.shopify.com/s/files/1/0437/7369/0017/files/14879351600.pdf
    • https://cdn.shopify.com/s/files/1/0432/2849/6036/files/97265062211.pdf
    • https://cdn.shopify.com/s/files/1/0430/0043/0746/files/contoh_skripsi_akuntansi_keperilakuan.pdf
    • https://cdn.shopify.com/s/files/1/0429/6183/0037/files/22202175420.pdf
    • https://cdn.shopify.com/s/files/1/0430/8962/5250/files/woduxubafaxuredefat.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_off000069c1.bin
d779d8aaa42c878dc6c14ab376a357b67950ff96b69aa3fc9f35a817374585e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x69C1 5864 bytes
font_01_sfnt_off00007db5.bin
f048e653694c4986a61d52d226d85577c9618115a7ee166911f4fd5fe2bef758
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DB5 10120 bytes