Malicious PDF — malware analysis report

Static analysis result for SHA-256 30aaabd9aafbbb0b…

MALICIOUS

PDF

39.8 KB Created: 2020-08-21 19:23:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 13326ae4e5e12052198283028c9ea26a SHA-1: 81742108cc746fb96237028f97a306cf11c713f1 SHA-256: 30aaabd9aafbbb0b1aa0acb736d765ca75a33069667fb44d10eb9a6d72b68aa4
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One of these links, 'https://ttraff.com/pify?keyword=implosion+never+lose+hope+full+mod+apk', is identified as a known malicious redirector. The presence of a link farm and a malicious redirector suggests an attempt to lure users to malicious content, likely for phishing or malware distribution.

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=implosion+never+lose+hope+full+mod+apk
    • http://rimupefu.nasrinbakheet.com/uploads/1/3/0/8/130874493/7550908.pdf
    • http://wagar.closets-now.com/uploads/1/3/0/7/130738970/vevoj_ronasuzexe.pdf
    • http://files.eemnmissionsblog.org/uploads/1/3/0/7/130776646/180102.pdf
    • http://mozavu.neblawyer.com/uploads/1/3/1/4/131438641/5405899.pdf
    • http://files.sourcegifts.com/uploads/1/3/0/8/130874035/fisedu_fegepulegulase_nazepuw.pdf
    • https://cdn.shopify.com/s/files/1/0440/5637/9557/files/abstract_algebra_fraleigh.pdf
    • https://cdn.shopify.com/s/files/1/0428/3577/1558/files/2241293980.pdf
    • https://cdn.shopify.com/s/files/1/0428/6581/9814/files/calendario_con_numero_settimane_2019.pdf
    • https://cdn.shopify.com/s/files/1/0429/5963/4591/files/aurangzeb_movie_moviescounter.pdf
    • https://cdn.shopify.com/s/files/1/0431/5817/5906/files/minerales_alimenticios.pdf
    • https://cdn.shopify.com/s/files/1/0430/8303/8881/files/code._org_course_f_lesson_16_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/3183/0421/files/delete_youtube_playlist.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_off00005c7d.bin
7d51f1d8a239be5bd4e805574bb6bd4636e58c7e754138a3359d6e1f5410e074
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C7D 5340 bytes
font_01_sfnt_off00006e79.bin
363c48b9029963ccf6e516cc9c74c66e6b5c98e5989626cc92ecf5c129c176c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E79 10464 bytes