Malicious PDF — malware analysis report

Static analysis result for SHA-256 c68e615ae1cc2572…

MALICIOUS

PDF

43.2 KB Created: 2020-08-04 01:36:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4972e99835e33b9c69fe0098bf335d27 SHA-1: 58a5a14180bacaa3591a177d4e059b21a719d405 SHA-256: c68e615ae1cc2572604e58be5e8e4dc5ed5311a05e90db17fbe693b368849fbe
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to `https://ttraff.com/pify?keyword=4th+grade+daily+math+review+pdf`. It also contains a large number of embedded links to various PDF files, likely as part of an SEO link farm to obscure the malicious redirect. No scripts were extracted from this sample, but the presence of the malicious redirector and the link farm strongly suggest a phishing or malware distribution attempt.

Heuristics 3

  • 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.
  • 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=4th+grade+daily+math+review+pdf
    • http://files.booksyoucantrust.com/uploads/1/3/1/4/131452840/wotarigaladugog_milonikobul_mosulosaburavux_zumelafoto.pdf
    • http://files.edeio.org/uploads/1/3/2/7/132740296/mefopusupeligi.pdf
    • http://files.fiberenvy.net/uploads/1/3/0/7/130740184/99e487a2d.pdf
    • http://files.greyhoundstorage.com/uploads/1/3/2/7/132740836/178d98ce28d3f.pdf
    • http://files.allstateglassshowers.com/uploads/1/3/2/8/132814375/f3beb305869446.pdf
    • https://cdn.shopify.com/s/files/1/0436/9825/8088/files/dark_souls_2_flynns_ring.pdf
    • https://cdn.shopify.com/s/files/1/0431/3861/3399/files/lego_architecture_studio_booklet.pdf
    • https://cdn.shopify.com/s/files/1/0438/9008/1960/files/xafixogarotirufilaki.pdf
    • https://cdn.shopify.com/s/files/1/0431/5054/0964/files/figedimatodejejet.pdf
    • https://cdn.shopify.com/s/files/1/0431/6980/8548/files/magewe.pdf
    • https://cdn.shopify.com/s/files/1/0431/8891/2290/files/rulosufokov.pdf
    • https://cdn.shopify.com/s/files/1/0434/8149/7766/files/jewukumerexudan.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71860998709.pdf
    • https://cdn.shopify.com/s/files/1/0432/1011/3188/files/screen_acting_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0430/6511/4775/files/xajuruso.pdf
    • https://cdn.shopify.com/s/files/1/0427/7947/6134/files/woxonatomezaj.pdf
    • https://cdn.shopify.com/s/files/1/0436/2783/9641/files/nogobarawu.pdf
    • https://cdn.shopify.com/s/files/1/0435/5093/3156/files/46214121305.pdf
    • https://cdn.shopify.com/s/files/1/0437/1025/1176/files/95768136715.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_off0000680b.bin
e7c7a69b86f4ff9207eb26e519d247405a2610968edb716cf20150350836bbdd
pdf-font-stream PDF embedded font (sfnt) at offset 0x680B 5524 bytes
font_01_sfnt_off00007ace.bin
fda806910f2d69fafb2eba1873fc755b14c41760dcc49dbd6ba426db5480b487
pdf-font-stream PDF embedded font (sfnt) at offset 0x7ACE 10716 bytes